Kanpur-based railway engineers have discovered that a harmonic filter, installed in electric locomotives, is causing engine failures and is unnecessary in modern engines. After extensive testing, including collaboration with IIT Kanpur and the Research Designs & Standards Organisation (RDSO), the Indian Railways has approved the removal of these filters from all...
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electric locomotives. The removal process will begin in the last week of this month. This decision is expected to significantly reduce engine failures, as the harmonic filters were found to be the main culprit behind the issue. Earlier, these filters were used to protect other parts of the engine from radiation discharge, but modern engines do not require them.